Panel condenser



May 4 1926.

, A. A. KENT PANEL CONDENSER Filed May 12, 1925 ATTORNEY.

' Patented May-4,1926.

"PATENT Fries.

ARTHUR ATWATER KENT, or ARDMOBE, rnNNsYLvANIa.

' PANEL CONDENSER.

Application filed May 12, 1925. Serial No. 29,657. i

' To all whom it may concern:

Be it known that I, ARTHUR A'rwATER' KENT, a citizen of the United States, residing at Ardmore, county of Montgomery, and State of Pennsylvania, have invented certain new and useful Improvements in Panel Condensers, of which the following is a specification.

My invention relates to electrical condensers, and more particularly to variable condensers of the plate type utilizabl'e for variation of capacity or tuning of circuits, particularly circuits traversed by high frequency current or oscillations, as in radio systems. I r p I In accordance with my invention, the statlonary armature assembly,or stator, is sup-- ported in operative relation to the rotor by.

means permitting adjustment of the stator with respect to the rotor'in a plurality of directions and comprising a memberupon which the stator is adjustably mounted, the member itself in turn adjustably mounted on a supporting member.

Further in accordance with my invention,

' I provide structurefor mounting the rotor and stator, preferably independently of each other, upon a panel or cabinet wall, as of sheet metal, to which the aforesaid supporting member, preferably of sheet metal, is

secured by suitable means, as welding.

My invention resides in structure of the character hereinafter described and claimed. For an illus'trationofone of various forms my structure may take, reference is to be had'to the accompanying drawing, in which:

Figure 1 is a vertical sectional view, partas a panel or wall of'a cabinet or housing containing the elements of a radio receiving set, asdescribed in my application Serial Number 28,808 filed May 8, 1925. Upon the panel is mounted the rotor of the condenser; and upon a supporting member 2, as a ledge secured to the supportl, is carried the stator. In the example illustrated the members 1 and 2 are of sheet metal, as steel or equivalent, secured to each other in any sultableway, as, for example, by spot-welding the upturned angle-or flange 2310f the member 2 to the plate 1 as indicated at 4.

The rotor bearing member 5 is in the form of a metal sleeve having. a portion 6 of reduced diameter extending through a hole of similar diameter in the panel 1, with its end spun or worked over into the form of" the flange 7, between which and the shoul der on the sleeve 5*the panel 1 is snugly gripped, whereby the bearing sleeve 5 is rigidly fixed to the plate 1.

At its end remote from the plate 1 the sleeve 5 is provided with a conical' seat 8, upon which bears the conical enlargement 9 upon the shaft 10, which has a rotatable bearing in the sleeve-5 and projects beyond the same to the opposite side of the plate :1, where there is secured to the support 10 the operating handle or knob 11, integral with which is the dial 12, carrying the usual graduations for cooperation with a pointer on the plate 1. The members 11 and 12 are preferably constituted of molded insulating material, such as Bakelite, condensite or the like. Molded, in the knob structure is the metallic insert member 13 throu h a. wall of which extends the set screw 14: or securing the sleeve 13, and therefore the knob and dial, to the shaft 10, whereby the shaft 10 may be rotated to effect rotation of the hereinafter described rotor structure. .7 7. Between the end of member 13 and the plate 1 is disposed the bowed spring 15 which is held under compression between 5 the member 13 and the plate 1, thereby exerting a-longitudinal thrust towardv the left upon-the shaft 10, Fi 1, causing the conical bearin 9 of the s aft snugly to bearin' the 'conic'a? bearing 8 in the bearing member 300 cured to the shaft in 5. The spring. has the aperture 16 through which shaft 10' loosely extends,

whereby the spring is free or floats between members 1 and 13.

Upon the part of the shaft 10 overhung beyond or extending to the right of the hearing member 5, as indicated in Fig. 1, are secured one or more parallel conducting leaves or plates 17 constituting the rotatable armature assembly or rotor element of the condenser. These plates or leaves 17 may be sevarious ways 'wel understood in the art. In the example illustrated, however, the leaves. 17 and a cylindrical hub portion 18 arean integral casting, which may be die cast upon the shaft which latter is preferably of-steel or the Co-acting with the, rotor leavesjor plates 17 are the stator leaves or plates 19 disposed substantially parallel with each other and suitably spaced to permit interleaving therewith of therotor plates, as 'well understood in the art. In the example illustrated the stationary armature plate assembly or stator is a die cast unit, in which the'several leaves orpla-tes 19. are cast integral with one or more members 20, 20

- element may Threaded into a face of the member 20 extending substantially parallel with the axis of the shaft 10 are the screws 21,-21 extending through holes 22,. 22 in the intermediate member or block 23 of insulating material.

The holes 22 are preferably of considerably larger diameter than the screws 21 whereby the screws and therefore the stator element may be shifted or adjusted with respect to the block 23 in. a plurality of directions, as upwardly and downwardly and laterally. The upward or downward adjustment serves to pre etermine the extent of interleaving or overlapping of the plates, 17- and 19, and therefore the magnitudes of the capacity of the condenser for difierent positions of the lates 17 in their revolution about the axis of the shaft 10. The lateral adjustment, in a direction parallel to the axis of the 10, serves to adjust the stator in like direction with respect to porting member 2. Furthermore the stator be tilted or in efiect adjusted about an axis at right angles to the shaft 10 as by causingthe right hand screw 21,

towardthe bottom of its hole 22.

The supporting member 2 is provided with extending through the apertures 24,. and

threaded into the block 23. It will be un-Y derstood, however, that the apertures 24 may be slots extending at right angles to the axis of the shaft 10, or may be enlarged holes described is a part.

shaft the block 23 and its sup-' 1, to be adjusted toward the top of its hole 22 while the other screw 21 is adjusted permitting adjustment of the block 23 upon the member 2 in both said directions.

l and stator elements Wlll be fixed in suitable cooperating positions. Or' after fixing the stator it may be adjusted in any of the directions aforesaid by loosening the appropriate screws, effecting the adjustment and then again tightening the screws.

The structure above described is broadly of the character disclosed in the aforesaid application, particularly in that the rotor has a single bearing member by which it is solely secured to or supported upon the panel '1, and the stator structure is supported upon or secured to the panel 1 independently of the mounting or support of the r otor element, whereby the panel 1 is a component part of the condenser unit, and whereby the positions of the rotor and stator elements with respect to each other are. determined by their respective independent attachments to the panel 1. v v As above indicated the plate 1 may be the panel or wall of a cabinet containing the several elements or devices of a radio receiving set of which the condenser structure As described in the aforesaid application various devices or elements of the receiving set may be carried by or mounted upon the panel 1, either directly or upon the ledge member 26 having the angle or flange 27 secured to the panel 1 as. by spot-welding such as indicated at 28.

What I claim is:

1. The combination with a panel, of rotor and stator elements of a condenser, means for supporting sald'rotor element, and means for supportmg said stator element comprising a supporting member secured to said I panel, a member intermediate said supporting member and said stator element, and means adjustably securing said intermediate member to said supporting member.

2. The combinatlon with a panel, of rotor and stator elements of a condenser, means for supporting said rotor element, and means for supporting said stator element comprising a supporting member secured to said 'p-anel, a member intermediate said supporting member and sai d,stator element, and means adjustably securing said stator element to said intermediate member.

' The combinationwith a panel, of rotor and stator elements of acondenser, means for supporting said rotor element, and means fer supporting said stator element comprising a supporting member secured to said panel, a member intermediate said supporting member and said stator element, means adjustably securing said stator element to said intermediate member, and means adjustably securing said intermediate member to said supporting member.

4. The combination with a metallic panel, of rotor and stator elements of a condenser, meansfor supporting said rotor element, and means for supporting said stator element comprisirg a metallic supporting niemben secured to said panel, a block of insulating material intermediate saidsupporting member and said stator element, and means adjustably securing said block to said supporting member. I

5. The combination with a metallic panel, of rotor and stator elements of a condenser, means for supporting said rotor element, and means for supporting said stator element comprising a metallic supporting member secured to said panel, a block of insulating material intermediate; said supporting member and said stator element, and means adjustably securing said stator element to said block.

6. The combination with a metallic panel, of rotor and stator elements of a condenser, means for supporting said rotor element, and means for supporting said stator element comprisipg a metallic supporting member secured to said panel, a block of insulating material intermediate said supporting member and said statorelement, means for adjustably securing said stator element to said block, and means adjustably securing said block to said supporting member.

7. Condenser structure comprising rotor and stator elements, -and means for defining the position of said stator element comprising asupporting member, an intermediate member independent of said stator element secured to said supporting member and adjustable thereon ina direction parallel with the axis of rotation of said rotor element,

' and means securing said stator element to said lntermediate member.

' 8. Condenser structure comprising rotor and stator elements, and means for defining the position or said stator element comprising a supporting member, a member independent of said stator element intermediate said stator element and said supporting 7 member secured to said supporting member and adjustable thereon at right angles to the axis of rotation of said rotor element, and

means securing said stator lntermediate member;

9. Condenser structure compris ng rotor element to said and stator elements, and means for defining the position of said stator element comprising a supporting member, a member independent of said stator element intermediate said stator element and said supporting member securedto said supporting member, and means securing said stator element to said intermediate member permitting adjustment of said stator element with respect to said intermediate member in a direction parallel with the axis of rotation of said and means. securing said stator element to said intermediate member permitting rotative adjustment of said stator element with respect to said intermediate member about an axis at right angles to the axis of rotation of said rotor element.

11. Condenser structure comprising rotor and stator elements comprising substantially parallel plates, and means for defining the position of said stator element comprising a supporting member, a member independent oglisaid stator elementintermediate said stator element and said supporting member secured to said supporting member, and means securing said stator-element to said intermediate member permitting adjustment of said 'stator'element with respect to said intermediate member in a direction substantially parallel with the planes of said plates. v

12. Condenser structure comprising rotor and stator elements, a metallic supporting member for said stator element in conducintermediate member of insulating material between said supporting member and sald stator element, means adjustably securing said intermediate member upon said supporting member, and means adjustably securing said stator member on said intermediate member. 1

13.. Condenser structure comprising rotor' tive relation with said rotor element, an i cured to said panel, an intermediate member independent. of said 'sta'tor element secured to said sup orting member and adjustable d meanssecuring said stator elethereon, an ment to said intermediate member.

14, Condenser structure comprising rotor and stator elements, apanel, means secur-' ing said rotor member upon sa d panel, and means securing the stator element upon said panel independently or said first-named means comprising a supporting member socured to said panel, an intermediate member independent of said stator element secured to said supporting member, and means ad- 'justably securing said stator element to said intermediate member. I

15. Condenser structure comprising rotor and stator elements, a metallic anel, means i securing the rotor element to sa1d panel, and

means securing the stator element to said panel independently of said first-named means comprising a supporting member secured to said panel, an intermediate member independent of said stator element secured to said supporting member, at least one of said last-named members being of insulating material, and means securing said stator element to sald ARTHUR ATWATER KENT.

'ntermediate member. 

